Adds experimental flag --enable-experimental-ime-features.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index e86c6878e32a1d83e16a8a7aa3ee55410cce7bea..a652da9932595d2d059ca00635372658875e8fe4 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -89,6 +89,11 @@ const char kEnableConsumerManagement[] = "enable-consumer-management";
 // of GAIA.
 const char kEnableEmbeddedSignin[] = "enable-embedded-signin";
 
+// If this switch is set, there are some experimental IMEs or IME features will
+// be enabled in Chrome OS. This is only for internal dogfooders and developers.
+const char kEnableExperimentalImeFeatures[] =
+    "enable-experimental-ime-features";
+
 // Enabled sharing assets for installed default apps.
 const char kEnableExtensionAssetsSharing[]  = "enable-extension-assets-sharing";